Design and Anchorage Dependence of Shape Memory Alloy Actuators on Enhanced Voiding of a Bladder

Faezeh Arab Hassani; Gil Gerald Lasam Gammad; Roshini Priya Mogan; Tze Kiat Ng; Tricia Li Chuen Kuo; Lay Guat Ng; Percy Luu; Nitish V. Thakor; Shih Cheng Yen; Chengkuo Lee

doi:10.1002/admt.201700184

Design and Anchorage Dependence of Shape Memory Alloy Actuators on Enhanced Voiding of a Bladder

Faezeh Arab Hassani
, Gil Gerald Lasam Gammad
, Roshini Priya Mogan
, Tze Kiat Ng
, Tricia Li Chuen Kuo
, Lay Guat Ng
, Percy Luu
, Nitish V. Thakor
, Shih Cheng Yen^*
, Chengkuo Lee

^*Corresponding author for this work

Cancer

Research output: Contribution to journal › Article (Academic Journal) › peer-review

27 Citations (Scopus)

Abstract

The use of shape memory alloy (SMA) actuators to restore voiding of bladder for myogenic under active bladder (UAB) patients is proposed recently. Even though previous work show the unique capability of this technology for bladder voiding, the low voiding volume and high energy consumption of the device limit the advancement of this technique. This study proposes a novel approach using an interlaced configuration to overcome these limitations. In this device, SMA actuators are threaded through rigid anchor points of the flexible vest. The novel anchorage of SMA actuators provides more conformability for the vest and lower energy consumption for the device, while the new interlaced configuration enhances the voiding volume. The device is tested initially on a rubber model for the bladder, then it is implanted in an anesthetized rat, and a voiding volume of more than 20% at 4 V is successfully achieved. A commercial force sensor is integrated with the device to make it suitable for neurogenic UAB patients. The sensor provides a feedback control signal to the patient to initiate the actuation of the device upon fullness of bladder. The overall system is a promising advance over the state-of-the-art providing bladder voiding in UAB patients.

Original language	English
Article number	1700184
Journal	Advanced Materials Technologies
Volume	3
Issue number	1
DOIs	https://doi.org/10.1002/admt.201700184
Publication status	Published - 15 Jan 2018

Bibliographical note

Funding Information:
The authors would like to acknowledge financial support from following research grants: NRF-CRP10-2012-01 “Peripheral Nerve Prostheses: A Paradigm Shift in Restoring Dexterous Limb Function” and NRF-CRP8-2011-01 “Self-powered body sensor for disease management and prevention-orientated healthcare” from the National Research Foundation (NRF), Singapore, and Faculty Research Committee (FRC) grant “Thermoelectric Power Generator (TEG) Based Self-Powered ECG Plaster—System Integration (Part 3)” at the National University of Singapore. F.A.H. and C.L.: device design concept. F.A.H.: device modeling, fabrication, and characterization. F.A.H. and S.-C.Y.: experimental design and setup, and in vivo test data interpretation. G.G.L.G. and R.P.M.: animal surgeries. F.A.H.: in vivo test setup and device implantation on bladder. T.K.N., T.L.C.K., L.G.N., and P.L.: provided idea and motivation for bladder contraction device. N.V.T., S.-C.Y. and C.L.: principal investigators, study design, data interpretation.

Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Research Groups and Themes

Photonics and Quantum

Keywords

anchorage and design
flexible electronics
force sensors
neurogenic under active bladder
shape memory alloy actuators

Access to Document

10.1002/admt.201700184

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Cite this

@article{edf76446794e4df0926204de1cbd80e3,

title = "Design and Anchorage Dependence of Shape Memory Alloy Actuators on Enhanced Voiding of a Bladder",

abstract = "The use of shape memory alloy (SMA) actuators to restore voiding of bladder for myogenic under active bladder (UAB) patients is proposed recently. Even though previous work show the unique capability of this technology for bladder voiding, the low voiding volume and high energy consumption of the device limit the advancement of this technique. This study proposes a novel approach using an interlaced configuration to overcome these limitations. In this device, SMA actuators are threaded through rigid anchor points of the flexible vest. The novel anchorage of SMA actuators provides more conformability for the vest and lower energy consumption for the device, while the new interlaced configuration enhances the voiding volume. The device is tested initially on a rubber model for the bladder, then it is implanted in an anesthetized rat, and a voiding volume of more than 20\% at 4 V is successfully achieved. A commercial force sensor is integrated with the device to make it suitable for neurogenic UAB patients. The sensor provides a feedback control signal to the patient to initiate the actuation of the device upon fullness of bladder. The overall system is a promising advance over the state-of-the-art providing bladder voiding in UAB patients.",

keywords = "anchorage and design, flexible electronics, force sensors, neurogenic under active bladder, shape memory alloy actuators",

author = "Hassani, \{Faezeh Arab\} and Gammad, \{Gil Gerald Lasam\} and Mogan, \{Roshini Priya\} and Ng, \{Tze Kiat\} and Kuo, \{Tricia Li Chuen\} and Ng, \{Lay Guat\} and Percy Luu and Thakor, \{Nitish V.\} and Yen, \{Shih Cheng\} and Chengkuo Lee",

note = "Funding Information: The authors would like to acknowledge financial support from following research grants: NRF-CRP10-2012-01 “Peripheral Nerve Prostheses: A Paradigm Shift in Restoring Dexterous Limb Function” and NRF-CRP8-2011-01 “Self-powered body sensor for disease management and prevention-orientated healthcare” from the National Research Foundation (NRF), Singapore, and Faculty Research Committee (FRC) grant “Thermoelectric Power Generator (TEG) Based Self-Powered ECG Plaster—System Integration (Part 3)” at the National University of Singapore. F.A.H. and C.L.: device design concept. F.A.H.: device modeling, fabrication, and characterization. F.A.H. and S.-C.Y.: experimental design and setup, and in vivo test data interpretation. G.G.L.G. and R.P.M.: animal surgeries. F.A.H.: in vivo test setup and device implantation on bladder. T.K.N., T.L.C.K., L.G.N., and P.L.: provided idea and motivation for bladder contraction device. N.V.T., S.-C.Y. and C.L.: principal investigators, study design, data interpretation. Publisher Copyright: {\textcopyright} 2017 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim",

year = "2018",

month = jan,

day = "15",

doi = "10.1002/admt.201700184",

language = "English",

volume = "3",

journal = "Advanced Materials Technologies",

issn = "2365-709X",

publisher = "Wiley-Blackwell",

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T1 - Design and Anchorage Dependence of Shape Memory Alloy Actuators on Enhanced Voiding of a Bladder

AU - Hassani, Faezeh Arab

AU - Gammad, Gil Gerald Lasam

AU - Mogan, Roshini Priya

AU - Ng, Tze Kiat

AU - Kuo, Tricia Li Chuen

AU - Ng, Lay Guat

AU - Luu, Percy

AU - Thakor, Nitish V.

AU - Yen, Shih Cheng

AU - Lee, Chengkuo

N1 - Funding Information: The authors would like to acknowledge financial support from following research grants: NRF-CRP10-2012-01 “Peripheral Nerve Prostheses: A Paradigm Shift in Restoring Dexterous Limb Function” and NRF-CRP8-2011-01 “Self-powered body sensor for disease management and prevention-orientated healthcare” from the National Research Foundation (NRF), Singapore, and Faculty Research Committee (FRC) grant “Thermoelectric Power Generator (TEG) Based Self-Powered ECG Plaster—System Integration (Part 3)” at the National University of Singapore. F.A.H. and C.L.: device design concept. F.A.H.: device modeling, fabrication, and characterization. F.A.H. and S.-C.Y.: experimental design and setup, and in vivo test data interpretation. G.G.L.G. and R.P.M.: animal surgeries. F.A.H.: in vivo test setup and device implantation on bladder. T.K.N., T.L.C.K., L.G.N., and P.L.: provided idea and motivation for bladder contraction device. N.V.T., S.-C.Y. and C.L.: principal investigators, study design, data interpretation. Publisher Copyright: © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

PY - 2018/1/15

Y1 - 2018/1/15

N2 - The use of shape memory alloy (SMA) actuators to restore voiding of bladder for myogenic under active bladder (UAB) patients is proposed recently. Even though previous work show the unique capability of this technology for bladder voiding, the low voiding volume and high energy consumption of the device limit the advancement of this technique. This study proposes a novel approach using an interlaced configuration to overcome these limitations. In this device, SMA actuators are threaded through rigid anchor points of the flexible vest. The novel anchorage of SMA actuators provides more conformability for the vest and lower energy consumption for the device, while the new interlaced configuration enhances the voiding volume. The device is tested initially on a rubber model for the bladder, then it is implanted in an anesthetized rat, and a voiding volume of more than 20% at 4 V is successfully achieved. A commercial force sensor is integrated with the device to make it suitable for neurogenic UAB patients. The sensor provides a feedback control signal to the patient to initiate the actuation of the device upon fullness of bladder. The overall system is a promising advance over the state-of-the-art providing bladder voiding in UAB patients.

AB - The use of shape memory alloy (SMA) actuators to restore voiding of bladder for myogenic under active bladder (UAB) patients is proposed recently. Even though previous work show the unique capability of this technology for bladder voiding, the low voiding volume and high energy consumption of the device limit the advancement of this technique. This study proposes a novel approach using an interlaced configuration to overcome these limitations. In this device, SMA actuators are threaded through rigid anchor points of the flexible vest. The novel anchorage of SMA actuators provides more conformability for the vest and lower energy consumption for the device, while the new interlaced configuration enhances the voiding volume. The device is tested initially on a rubber model for the bladder, then it is implanted in an anesthetized rat, and a voiding volume of more than 20% at 4 V is successfully achieved. A commercial force sensor is integrated with the device to make it suitable for neurogenic UAB patients. The sensor provides a feedback control signal to the patient to initiate the actuation of the device upon fullness of bladder. The overall system is a promising advance over the state-of-the-art providing bladder voiding in UAB patients.

KW - anchorage and design

KW - flexible electronics

KW - force sensors

KW - neurogenic under active bladder

KW - shape memory alloy actuators

UR - https://doi.org/10.1002/admt.201700184

U2 - 10.1002/admt.201700184

DO - 10.1002/admt.201700184

M3 - Article (Academic Journal)

SN - 2365-709X

VL - 3

JO - Advanced Materials Technologies

JF - Advanced Materials Technologies

IS - 1

M1 - 1700184

ER -

Design and Anchorage Dependence of Shape Memory Alloy Actuators on Enhanced Voiding of a Bladder

Abstract

Bibliographical note

UN SDGs

Research Groups and Themes

Keywords

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